Device for fixing a microphone on a video camera

ABSTRACT

A device for fixing a microphone on a video camera including a fixed holder with a groove fixed to the camera, and a corresponding stepped microphone holder with a groove being connected to the fixed holder to thereby turn on a hinge pin. A U-shaped cut is formed on a side of a stepped portion of the microphone holder 4, and locking means with a knob, a threaded shaft and a cushion barrel lock the microphone holder. The threaded shaft is connected to the fixed holder so as to turn on a hinge pin, a spring flat resiliently supports the knob, a guide spring and a bolt are connected to one end of the spring flat, in an upper portion of the stepped microphone holder.

BACKGROUND OF THE INVENTION

The present invention relates to an adjustable device to mount amicrophone to a video camera.

Generally a microphone is attached to a video camera in use to couple aimage signal with a sound signal so as to secure a vivid expression ofthe scene.

As shown in FIGS. 1 and 2, a conventional device for attaching amicrophone on a video camera has a microphone holder 21 with an insidegroove 25 and an adjustable bolt with a knob 22, which is assembled to acorresponding holder 20 with a corresponding groove 24 and a bolt hole.The microphone holder 21 is turned on a hinge pin 27 after unscrewingthe adjusting bolt with a knob 22. The adjustable bolt 22 is used totighten the microphone holder 21 and the holder 20 together with themicrophone.

In this conventional adjustable device, the microphone holder 21 isturned on a hinge pin 27 by loosening the threaded bolt with a knob 22.Thereafter, the microphone is inserted into the groove 24 and clamped byturning the microphone holder 21 counterclockwise and screwing theadjusting bolt 22 to the bolt hole. When assembling them, a pair of pad23 and 26 presses the microphone to prevent it from sliding off andreceiving scratches on the surface of the microphone.

However, the threaded bolt 22 is apt to be loosen by a series of shocksand vibrations commonly occurred while the video camera is in use; andaccordingly the loosen microphone often creates noise to be mixed with asound signal. Moreover, the conventional fixing device also requiresgreater amount of time to mount the microphone.

SUMMARY OF THE INVENTION

Therefore an object of the invention is to provide a new adjustabledevice and related parts to mount a microphone on a video camera.

Another object of the invention is to provide a video camera wherein amicrophone is fixed firmly so as not to be shaken and is detached andattached easily and speedily.

According to the present invention, a device for attaching a microphoneon a video camera has a fixed holder with a groove, attached to thecamera, a corresponding stepped microphone holder with a grooveconnected to the fixed holder so as to turn on a hinge pin. A U-shapedcut is formed on a side of a stepped portion of the microphone holder 4,and locking means for locking the microphone holder, the locking meanshas a knob, a threaded shaft and a cushion barrel. The threaded shaft isconnected to the fixed holder so as to turn on a hinge pin, a springflat resiliently supports the knob, and a guide spring and a bolt areconnected to one end of the spring flat, in an upper portion of thestepped microphone holder.

The present invention will now be described more specifically withreference to the drawings attached only by way of example.

BRIEF DESCRIPTION OF DRAWINGS

For a better understanding of the invention and to show how the same maybe carried into effect, reference will now be made, by way of example,to the accompanying diagrammatic drawings, in which:

FIG. 1 is a plane view of a conventional microphone bracket;

FIG. 2 is a side view of a conventional microphone bracket;

FIG. 3 is a plane view of a microphone bracket constructed according tothe principles of the present invention; and

FIG. 4 is a side view of the inventive microphone bracket shown in FIG.3.

DETAILED DESCRIPTION OF CERTAIN PREFERRED EMBODIMENT

Referring to FIGS. 3 and 4, this inventive microphone fixing bracket hasa holder 2 with a groove 3 mounted on a camera and a correspondingstepped microphone holder 4 with a corresponding groove 5 connected tothe holder 2 so as to turn on a hinge pin 7. The stepped microphoneholder 4 has an U-shaped cut 6 formed on a side of its stepped portionwhere locking means of a knob 10, a threaded bolt 17 and a cushionbarrel 8 are engaged for locking. The stepped microphone holder 4 alsohas a bolt 16, a guide spring 15 and a spring flat 9 set into its upperportion. The cushion barrel 8 is located under the knob 10 so as toreceive the spring flat 9 between the knob 10 and the barrel 8 whenlocking. A pair of pads 11 and 12 inserted into the respective grooves 3and 4 are for tightening the microphone within the cushion safely andprotecting the surface of the microphone from scratches.

As illustrated above, there is provided a minute clearance between thecushion barrel 8 and the knob 10 by turning and loosening the knobslightly. Thereafter the locking means assembly formed by barr 8, 10knob and bolt 17 slides out from the U-shaped cut 6 of the steppedmicrophone holder 4 by pushing and rotating the knob 10counter-clockwise about the hinge pin 14 at 90 degrees. Opening thestepped microphone holder 4 by turning clockwise at 90 degrees, themicrophone 13 is placed in the groove 3 with pad 11 and the rear portionof the microphone 13 inserted into a microphone jack. After placement,the microphone holder 4 is returned and the locking assembly 8, 10 and17 are inserted into the U-shaped cut 6 by pulling and turning the knob10 and the adjustable bracket becomes locked. Then the microphone 13 istightened and set firmly by driving the knob downward so as to press thespring flat 9 and let the cushion barrel press the microphone holder 4with a certain force. At the time, the pair of pads 11 and 12 protectthe surface of the microphone from scratches and the spring flat 9prevents the knob 10 from being apt to be loosening in case of a shockor shaking occurring during use.

In conclusion, this invention provides a video camera with a newmicrophone fixing device to prevent the microphone from being shaken orfrom trembling while, and to enable attachment and detachment of themicrophone to and from a camera speedily.

While the invention has been particularly shown and described withreference to a preferred embodiment, it will be understood by thoseskilled in the art that modifications in detail may be made withoutdeparting from the spirit and scope of the invention.

What is claimed is:
 1. A device for securing a microphone on a video camera, comprising:a fixed holder having a circumferential groove adapted to secure said microphone, said fixed holder being attachable to a body of said video camera; a stepped microphone holder having a circumferential complementary groove adapted to secure said microphone, said stepped microphone holder being pivotally mounted at one end of said fixed holder by a first hinge pin for enabling said stepped microphone holder to rotate about said first hinge pin; an U-shaped recess formed on a stepped portion at a second end of said stepped microphone holder; locking means for locking said stepped microphone holder with said fixed holder, said locking means having a knob, a threaded shaft and a cushion barrel, said threaded shaft being pivotally mounted at a second end of said fixed holder by a second hinge pin enabling said locking means to rotate about said second hinge pin; a spring flat for resiliently supporting said knob; a guide spring being connected to one end of said spring flat in an upper portion of said second end of said stepped microphone holder; and means for securing said one end of the spring flat in said upper portion of said stepped microphone holder.
 2. A microphone holder for a video camera, comprising:a first holder attached to a body of said video camera having a first internal groove adapted to secure a microphone; a second holder pivotally mounted at a first end of said first holder having a second internal groove adapted to secure said microphone and an U-shaped recess within a stepped region of an outermost end, said first and second internal grooves forming a circular band adapted to encircle said microphone; locking means pivotally mounted at a second end of said first holder, for enabling said first and second internal grooves to secure said microphone, said locking mechanism comprising a threaded shaft supporting an intermediate protrusion and a knob rotatably mounted on a distal end of said shaft; a spring flat for resiliently supporting said knob while said locking means is loosely positioned within said U-shaped recess; and means for securing one end of said spring flat onto an upper region of said outermost end of said second holder.
 3. A microphone holder for a video camera, comprising:a base attached to a body of said video camera having a first substantially semi-circular groove adapted to secure a microphone; a holder pivotally mounted at one end of said base having a second substantially semi-circular groove adapted to secure said microphone, said holder having an U-shaped recess formed at a lower region of an outermost end, said first and second substantially semi-circular grooves encircling the microphone as said holder pivots at said one end of said base; securing means pivotally mounted at a second end of said base, for securing the microphone between said groove of said base and said groove of said holder; spring flat means for resiliently supporting said securing means while said securing means is positioned within said U-shaped recess; and means disposed to connect one end of said spring flat means onto an upper region of said outermost end of said holder, for enabling said spring flat means to resiliently support said securing means while said securing means is positioned within said U-shaped recess, said securing means comprising means for rotating around said second end of said base and into said U-shaped recess to engage said holder and for drawing said second end of said base toward said outermost end of said holder, an elongate member having a length between said second end of said base, a first protrusion extending transversely to said length at a location intermediate said U-shaped recess and said spring flat means, and a second protrusion extending transversely to said length at a distal end of said length.
 4. The holder of claim 3, further comprised of said spring flat means engaging said first protrusion while said elongate member is within said U-shaped recess.
 5. The holder of claim 3, further comprised of said second protrusion being adjustably connected to said elongate member to force said first protrusion against said lower region of said outermost end in response to relative movement between said second protrusion and said elongate member.
 6. The holder of claim 4, further comprised of said second protrusion being adjustably connected to said elongate member to force said first protrusion against said lower region of said outermost end in response to relative movement between said second protrusion and said elongate member. 